1268 search results - page 51 / 254 » On database query languages for K-relations |
DBPL
2001
Springer
14 years 7 days ago
2001
Springer
Abstract. We address a fundamental question concerning spatio-temporal database systems: “What are exactly spatio-temporal queries?” We define spatio-temporal queries to be co...
EDBT
2012
ACM
11 years 10 months ago
2012
ACM
We present an effective optimization framework for general SQLlike map-reduce queries, which is based on a novel query algebra and uses a small number of higher-order physical ope...
SAC
2008
ACM
13 years 7 months ago
2008
ACM
We address aggregate queries over GIS data and moving object data, where non-spatial information is stored in a data warehouse. We propose a formal data model and query language t...
PODS
2008
ACM
14 years 7 months ago
2008
ACM
A survey of effective characterizations of tree logics. If L is a logic, then an effective characterization for L is an algorithm, which inputs a tree automaton and replies if the...
EDBT
2006
ACM
14 years 7 months ago
2006
ACM
Ontology languages to represent ontologies exist in large numbers, and users who want to access or reuse ontologies can often be confronted with a language they do not know. Theref...